Electric forcing-machine



(No. Model.) 2 Sheets-Sheet 1.

G. D. BURTON. ELECTRIC PORGING MACHINE.

No. 435,110. Patented Aug. 26, 1890 WITNESSES.

(No Model.) 2 Shets-Sheet 2.

G. D. BURTON.

ELECTRIC FORGING MACHINE.

No. 435,110 Patented Aug. 26, 1890.

4 L I f? WIT ESS'ES.

UNITED STATES PATENT OFFICE.

A GEORGE D. BURTON, OF BOSTON, MASSACHUSETTS. I

ELECTRIC FORGlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 435,110, dated August 26, 1890. Application filed June 7, 1890. Serial No. 354,599. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE D. BURTON, a citizen of the United States of America, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Electric Forging-Machines, of which the following is a specification.

This invention relates to an electric forg 1ng-mach1ne for making bolts, railroad-spikes,

- coupling-pins, and similar articles.

The object of the invention is to provide a machine for making articles of this character in a rapid and economical manner.

Figure 1 of the accompanying drawings represents a side elevation of this improved forging-machine. Fig. 2 represents a plan view, partly in horizontal section, on line 2 2 of Fig. 1. Fig. 3 represents an enlarged front elevation of a portion of one of the electrodes.

Similar numerals of reference indicate corresponding parts in the different figures.

The frame of this machine comprises a base and two stands 11 and 12, attached to said base or cast integral therewith. The lower portions of these standards are curved outward and the upper portions thereof are straight, the straight portions being provided on their inner faces with vertical guideways 13 and at their upper ends with shaft-bearings 14. The curved portion of the standard 11 is divided into two webs 15, which form a recess or opening 16 in the standard, and

two pivot-pins 1S and 10 are disposed one above the other in said recess. The curved portion of the standard 12 is provided with a horizontal tubular guideway 17.

A crank-shaft 20 is supported in the bearings 14 of the standards. This shaft is provided at one end with a driving-pulley 21 and at the opposite end with a balance'wheel 22. The shaft is also provided with cams 23 and 24, disposed outside the standards and having peripheral grooves 25 and 26. The crank 27 of the crank-shaft is disposed between the standards.

Two oscillating gripping-jaws 30 and 31 are pivoted on the pivot-pins 18 and 19 of the standard 11. These jaws are provided with toothed segments 32, which intermesh with each other, whereby motion is communicated from the upper to the lower jaw. The upper jaw 30 is provided with a slot 33, through which the pivot-pin 18 passes, and a spring 34 is interposed between said pivot-pin and the lower end of said slot, whereby the jaw has a yielding grasp upon the rod 100, from which the articles are forged. This jaw is attached to a lever 35, the upper end of which enters the groove 25 of the cam 23, whereby the oscillation of the jaws is effected, said lever being constructed of wood or being otherwise insulated from the jaw. The lower jaw 31 is preferably insulated from its pivot and from the standard.

A plunger 40, having a concave face 41 for upsetting. the heads of the bolts, spikes, or pins forged from the rod 100, slides horizontally in the tubular guidewayl? of the standard 12. This plunger is provided near its outer end, on its opposite sides, with lateral studs 42.

A curved lever 50 is pivoted at its lower end to the baselO, and enters at its upper end the cam-groove 26 of the cam 24. This lever is provided opposite the tubular guideway 17 with a curved face 51, against which the outer end of the plunger rests. Links 52 are pivoted at their outer ends on studs 53 on opposite sides of the lever 50. These links are provided with slots 54, which engage the studs 42 of the plunger 40. r The lever is provided on one side with a recessed lug 55.

A cross-head slides on the vertical guideways 13 of the standards, and is connected with the crank 27 by means of a pitman 61. This cross-head is provided with a downwardly-projecting spindle 62.

The bed-die is fixed to the base 10, and the movable die 71 is attached to the spindle 62. These dies are provided with grooves 72 across their faces, which form or shape the body of the bolt or other article, and at their front ends with teeth 73, which partially sever said bolt from the rod 100 being worked.

Two electrodes and 85, designed for pass ing an electric current through the portion of the rod to be forged for heating it, are supported upon a bench 82 or other suitable support upon one side of the base 10 and project into the path of the rod being worked on the front and rear sides of the die. The bench is constructed of wood, or the electrodes are otherwise insulated therefrom. These electrodes are in the form of bars composed of conducting material, preferably copper. The front electrode 80 is provided with an eye 81, through which the rod being worked passes. This eye is preferably provided with a detachable copper ring 82, which maybe interchanged with rings having holes of different sizes to fit rods of different diameters. The movable electrode 85 is provided near its outer end with a stud or anti-friction roller 86. A bell-crank lever 87 is pivoted to the bench 82 and engages at one end the recessed lug 55 of the lever 50 and at the other end with studs 86 on the movable electrode, and serves to thrust into position and retract said electrode. Flexible electric cables and 91 are connected to the rear ends of the electrodes tween the electrodes.

and serve to conduct electricity from a dynamo-electric machine or other proper source of electricity.

Rollers 95 and 96, mounted in suitable standards in front of the base, serve to support the outer end of the rod being worked. These rolls may also serve as feed-rolls, it required.

The operation is as follows: In the drawings the movable parts of the mechanism are represented as in the positions which they assume when the dies and 71 are acting upon the rod 100 to form therefrom the body of a nail, spike, or pin. In this position the movable electrode is in active position and the inner end of the rod 100 is in contact therewith, and a heavy current of electricity is passed through that portion of the rod be- As the crank-shaft 2O continues to revolve, the upper die 71 is withdrawn from the rod 100, and the cam 24: swings the lever 50 in inward direction,whereby the bell-crank lever 87 is actuated and withdraws the rear electrode from the path of the rod. Said cam continues to move the lever inward, and at the same time the cam 23 moves the upper end of the lever 85 outward, whereby the jaws 80 and 31 are made to grasp the rod and hold it firmly, while the plunger 40, actuated by the lever 50, upsets a head on its inner end. After the head is formed and the article knocked off the jaws feed the rod for another article, and the bellcrank lever thrusts forward the movable electrode and the operation is repeated.

I claim as my invention- 1. The combination of forging-dies, a feeder for feeding the rod to be worked to said dies, and electrodes consisting of bars of conductive material disposed on opposite sides of said dies, one of said bars being provided with an eye through which said rod passes, substan tially as described.

2. The combination of forging-dies, a feeder for feedin the rod to be worked to said dies, electrodes consisting of bars of conductive material disposed on opposite sides of said dies, one of said bars being provided with an eye through which said rod passes, and means for thrusting and retracting the other electrode into and out of position for contact with said rod, substantially as described.

3. In a metal-working apparatus, the combination of forging-dies, oscillating jaws provided with toothed segments for grasping a rod to be worked,a lever connected to one of said jaws, a cam for actuating said lever, and electrodes for heating the bar to be worked.

4. The combination of forging-dies, an upsetti1'1g-plunger,and electrodes for heating the rod to be worked.

5. The combination of forging-dies, an upsetting-plunger, electrodes for heating the rod to be worked, and means for thrusting and retracting one of said electrodes at proper intervals, substantially as described.

6. In a i'netalqvorking apparatus, the coinbination of jaws for grasping a rod to be worked, an upsetting-plunger, and electrodes for heating said rod.

7. In a metal-working apparatus, the combination of a base, a bed-die supported thereon, standards provided with guideways and bearings, a crank shaft supported in said bearings, a cross-head movable on said guideays, a movable die connected with said cross-head, a pitman connecting said crosshead with the crank of the crank-shaft, cams on said crank-shaft, jaws pivoted to one of said standards and provided with intersecting segments, a lever connected with one of said jaws and engaging the groove of one of said cams, an upsetting-plunger sliding in guideways of the other standard, and a lever actuating said plunger and engaging the groove of the other cam, and electrodes for heating the rod to be worked, substantially as described.

8. The combination of forging-dies, two electrodes, one of which is movable, a bellcrank lever for engaging the movable electrode, an upsetting-plunger, and a lever for actuating said plunger provided with a recessed lug engaging said bell-crank lever.

GEO. D. BURTON. Witnesses:

CHESTER MARR, R. W. GALLUPE. 

